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Write Swift

Write Swift is an agent skill (a SKILL.md file) from emilkowalski/skills. How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics. It works with Claude Code and has 43,964 GitHub stars across a repository of 13 listed skills.

github.com/emilkowalski/skills/skills/write-swift (opens in a new tab)

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift ~/.claude/skills/write-swift   # personal, or .claude/skills in a project

In the Claude apps, zip the write-swift folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift .agents/skills/write-swift   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift .cursor/skills/write-swift   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features agents don't know about yet. Use when writing, reviewing, or migrating Swift, or when a concurrency error, a hang, a data race, a retain cycle, or a performance problem needs fixing.

When it triggers

  • Use when writing, reviewing, or migrating Swift, or when a concurrency error, a hang, a data race, a retain cycle, or a performance problem needs fixing.

More skills in emilkowalski/skills

13 skills are listed from this repository.

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FAQ

Write Swift FAQ

Still curious? Email info@appsgit.com.

What is the Write Swift skill?

Write Swift is an agent skill (a SKILL.md file) from emilkowalski/skills. How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics. It works with Claude Code and has 43,964 GitHub stars across a repository of 13 listed skills. Its SKILL.md lives at github.com/emilkowalski/skills/skills/write-swift.

How do I install the Write Swift skill?

Copy the write-swift folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Write Swift skill free?

Yes. The repository is open source under the MIT license.

Is Write Swift maintained?

The repository's most recent commit was on Oct 2, 2026. appsgit only lists skills from repositories with a commit in the last six months.